Arrangement for and method of transferring heat and cold from and to machine parts



Sept. 2, 1952 K. HAASE ETAL ARRANGEMENT FOR :AND METHOD OF TRANSFERRING HEAT AND cow FROM AND TO MACHINE PARTS Filed Dec. 29, 1949 wl 0 D m m. wm 5 p n ww y mxnm A (for/mus Patented Sept. 2, 1952 ARRANGEMENT FOR AND "METHOD OF TRANSFERRING HEAT AND com) FROM AND 'ro MACHINE PARTS Kurt Haase, I'Melkendorf, near Kulmbach, and

Walter Qstwald, Heppenheim, Germany, as- 5131101519 .S iidwerke G. in. b. H., Kulmbach,

Germany ApplicationfDecember 29, 1-949, .Serial'No.-.135.,77,l

In GermanyDecember 30,1948

:5 Claim 1 When building machine parts, especially cylinders and cylinder-heads of'power plants and work-performing machinery, it is customary to provide the same with passage means of substantially the same cross-section throughout their length for conveying cooling or heating means therethrough. However, these passage means as heretofore provided," have a relatively complicated shape and, as a' rule, arespiral-shaped with at least a plurality of windings. Consequently, they are 'diificult to get at, and as a result thereof,

can either not at all or only incompletely 'be cleaned, sothat the-deposit of limecannot properly'be coped-with. On the other hand, the deposit of lime in such passages, reduces the 'eifective cross-section of the cooling or heating channels,

thereby throttling the flowof cooling or heating media therethrough, which in turn results in a reduction in the cooling or heatingeffect.

In addition to the above, the provision of the heretofore customary wind-in cooling or heating channels, especially 'incylinder heads, is rather difiicult and expensive.

It is, therefore, an object of the present invention to provide an arrangement which willovercome the above-mentioned drawbacks.

It is a furtherpbjectof this invention to pro- .v ide an arrangement which-will make it. possible to machine the channels for the. transfer of heat or cold without complicating the-structure.

It is a still further object of this invention to make it possible to locate the cooling or heating channels in the respective machine parts wherever it will result in the most effective temperature exchange without in any way afiecting a proper cleaning of said channels, thus bringing about a greater 'eiii'ciencyofthemachine or plant involved.

These and other objects and advantages of'the invention will appear more" clearly fromfthe; following specification in connection with the accompanying drawings, in which:

ous types, for instance, machine tools or cylinders,

'2 7 and/or cylinder heads of power plants, such machine parts are provided with channels or conduit means of at least approximately even cross sections, through which channels or conduit means pass the cooling or' heating means, such as water, brine, air or other heat or cold conveying fluid media. According to the present invention,

these chamiel or conduit means are subdivided into a plurality of sections of simple shape located in the respective machine part and respectively provided with an individual inlet and outlet. These sections are interconnected by tube means registering therewithand detachably connected to the outside of the respective machine part. The temperature exchange is effected .by the material of the machine partinvolved, which may-,for instance, consist of cast or forged light metal, brass, cast-iron, wrought=iron,,etc. "Iihe temperature conveyingchannels are preferably so arranged that they can be machined or can be constructed as cast-in conduits made of material having a higher melting point. 'When a liquid heat or cold conveying fluid medium is used, thechannels are preferably so arranged that they ascend in a continuous manner,v or by steps and, if desired, additional cooling fins. may bearranged on the outside. In order to increase the area over which the temperature. exchange takes place, and also to increase the turbulence supporting a favorable heat .or cold transfer, the inner areas of the channels may be. made corrugated or provided with other uneven surfaces.

When cooling, it is preferable to pass, the cooling medium in one. and the same direction, .i. e., to introduce the cooling medium into the, channels at a cool spot, and to withdraw the cooling medium at a hot spot. This manner of cooling willrequire the least cooling effort. When em- 7 ploying a liquid cooling medium for cooling machine parts separated from each'other by .ajoint, the connections'for the cooling medium are preferably not arranged at said joint, but separate therefrom, so that the gasket at said joint will merely serve one purpose. By subjecting the liquid or gaseous heat or cold conveying medium in the channels to a high flow velocity, a particularly favorable cooling result with regard to the quantity used of the fluid medium, and also with regard to efficiency, is obtained, and this result is furthermore improved by increased turbulence.

When applying the present invention to the air cooling of internal combustion engines, the further advantage is obtained that the motor will run with less noise than it has been possible heretofore With motors air cooled in the conven- 'lem of heating or cooling parts.

tional manner and provided with cylinders'having a thin wall and a great number of cooling fins.

Structural arrangement pipes 311 located on the outside of the cylinder head and detachably connected thereto in any convenient manner. The pipes 3a together with the channel sections 3 form a continuous channel through which is passed the cooling medium which enters the cylinder head 2 through an inlet 4 (see Figure 4). The cooling medium is withdrawn through the outlet 5 (Figures 2, 3). The cylinder head 2 has furthermore suspended therein, tappet valves 5 which, of course, may also be arranged standing in the cylinder head, rather than hanging. The cylinder 1 is cooled in a manner known per so, by a cooling medium which, after having passed through the cooling chambers of the cylinder head, is withdrawn and may be introduced into the cylinder head for cooling the same.

It will be appreciated that the arrangement of the channel sections 3 and the connecting pipes 3a according to the present invention, makes the provision of cooling or heating channels very simple, while making it possible in a very simple nection with the cooling of the cylinder head of an internal combustion engine, it is, of course,

understood that the principles of the invention are by no means limited to the cylinder heads of internal combustion engines, but may also be applied to other parts thereof and other types of machinery having connected therewith, the prob- The invention may be applied to the transfer of heat, as well as to the transfer of cold, and comprises any ing or heating medium therethrough, said conduit means being composed of a plurality of individual sections with each section open at both The simple shape of theof its ends, and pipe means detachably connected to the outside of said cylinder head and interconnecting said individual sections of said conduit means.

2. In combination, a cylinder head having a plurality of passage means of substantially the same cross-section extending straight through said cylinder head from one side to the other side thereof, and conduit means detachably conpassage means for interconnecting thesame so as to allow the successive passage of cooling or heating means through said passage means.

4. In combination, a cylinder head having a plurality of passage sections of substantially the same cross-section throughout the length thereof extending straight through said cylinder head from one side to the other side thereof, each of said passage sections being open at both ends, and said passage sections being arranged in different planes so that each plane contains two substantially parallel passage sections, and a plurality of pipe means detachably connected to the outside of said cylinder head and respectively registering with said passage sections, the arrangement being such that the pipe means on one side of said head respectively directly interconnect passage sections of the same plane, the pipe means on the other side directly interconnecting passage sections of different planes.

5. A cylinder head according to claim 2, in which the passage means extend in horizontal direction.

KURT HAASE. WALTER OS'IWALD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,279,008 Ross Sept. 17, 1918 2,277,113 Kimmel Mar. 24, 1942 2,339,972 Anderson et al Jan. 25, 1944 2,417,443 Rouy Mar. 18, 1947 FOREIGN PATENTS Number Country, Date 116,627v Austria. ,c n Mar. 10. 1930 552,697 Germany June 15, 1932 899,611 France Aug. 28, 1944 U 591,380

Great Britain Aug. 15, 1947 

